The black oxide of manganese, MnO₂.

(UK, dated) Any bovine cattle reared for its meat, as opposed to dairy cattle.

(mining) Tin ore (cassiterite), when dressed, stamped and washed, ready for smelting. It is in the form of a black powder, like fine sand.

A cathartic medicine composed of senna and magnesia.

(UK, historical, obsolete slang) The Irish shilling of 13 pence, as opposed to the English 'white hog' shilling of 12 pence

plural of black hog

A coarse, sponge-like form of elemental palladium that offers a large surface area for hydrogen adsorption and can be used as a catalyst for hydrogenation reactions.

plural of black durgon

Melichthys niger, a triggerfish with bright white lines running along its dorsal and anal fins.

Any species of Pseudechis, a genus of Australian snakes. / Crotalus oreganus, a venomous North American pit viper species of snake.